Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 3 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  METOP-B Lat/Lon    Distance(km)  Time Diff(sec)
 03/20/2021   06:12:32   (  -0.15,-128.37) (  -0.53,-130.17)  204.39                80
 03/21/2021   05:49:12   (  -0.15,-128.36) (   0.55,-125.16)  364.29                80
 03/22/2021   18:08:04   (   0.14,-128.44) (   0.42,-129.73)  147.07                80
 03/23/2021   17:50:04   (   0.14,-128.44) (  -0.66,-124.73)  421.49                80
 03/25/2021   06:09:03   (  -0.14,-128.34) (  -0.35,-129.33)  112.46                80
 03/26/2021   05:45:42   (  -0.14,-128.33) (   0.72,-124.32)  455.66                80
 03/27/2021   18:04:35   (   0.14,-128.40) (   0.24,-128.90)   56.66                80
 03/30/2021   06:05:34   (  -0.14,-128.28) (  -0.17,-128.49)   22.95                80
 04/01/2021   18:03:45   (   0.14,-128.32) (   0.06,-128.06)   30.75                80